Just thought i would let you guys know that the cylinder kit i ordered arrived this morning heres some photos

I have to say im impressed with the Quality just hope it lasts lol

Project Update!!

Soo i have had to Design a HeadSet Spacer for my new forks to fit, as the new taper bearing for the old forks dosnt fit the steering shaft on my new forks so i have designed this using Onshape, I have Ordered some Alliminium Tube which is 56mmOD 32mmID 12mmWall 200mm in lenth for £15 next thing todo is 3Dprint a Prototype then test fit then get my freind's Lathe going and make one out of the Alliminium

Project Update

My forks arrived today

Please welcome my WR426F forks
They are in decent nick for £150 they have Adjustable Compression Hardness on the bottom and Adjustable Dampening on the top, Bearings seam to be a perfect fit all i got todo is but a spacer under the bottom of the bottom taper bearing

Sorry for bad photos

Well i have had some Post Today

Swingarm bearings and bushes and seals aka service kit

Linkage bearings and bushes and seals aka service kit

Head race Taper bearings top and bottom

well im very happy to say that i have now finished putting my engine back togeather im just wating on a few bits from ethena to finish puting my cylinder head on but the rest is done Heres some photos

So upto now i have replaced with new

Stainless bolts
All Koyo bearings
all Athena Oil seals
All Athena Gaskets
New Athena topend

now i have all the rest of the bike to sort out,let me know what you guys think

Update So i have started to rebuild my Yamaha DTR 125 Engine today

New Bearings Fitted Replaced all of them!
New Athena Oil Seals Fitted!
New Stainless steel allan bolts!
Gear Box Back in one piece

Tomorrow i will be doing the Clutch and Balance shaft and all the gears that connect the Balance shaft and crank shaft together. i will also be putting my new athena barrel on then when the missing spacer washers arrive il put the head on.

Heres some photos of todays progress in order

Didnt need the manual much as this will be the 10th time of rebuilding these engines Super happy that im getting closer to my DTR Dream!!

Welcome to the club!

@theportingmaster said in 2003 Yamaha Dt125R Project:

K38 slow jet

cheers buddy, il be getting a limited edition stainless steel and silencer exhaust from portugal in the next few months, will upload photos when its arrived!

heres some photos all shiney and new

well guys for chrismas i got a PKW 32 keihin carb off my old man Looks mint he said its good for a 125cc upto a tuned 200cc will upload photos later on.

@calum other thing is when the bike was running the power valve didn’t move it’s not coked up or stiff as the top end and cables are all brand new just wondering if there’s anyway to find out if the cdi is goosed how can I check the signal from the cdi unit?

Right need some help please

Is there any way to find out if the 3rm-20 Cdi unit is okay?

the problem im having

Turn the bike on the power valve will turn to normal position but it dose not do the forward backwards cleaning cycle/movement when it turns on. It's the 5 wire power valve 2 wires go to the internal motor (black and red) (black and brown) and 3 wires (yellow and blue) (white and black) (white and red) go to the veriable risistor inside the power valve which is 7.5k ohms resistor

dose anybody know what the voltages out of the cdi unit should be while the bikes ignition is on for the powervalve side

any help greatly appriciated

@Calum Il copy and paste it into the forsale section but id like to leave it in here too as all the pics etc... are in here

Soo i have come to a very hard decision and have somthink i need to say and i would like everyone that see's this to have a read

All of the above parts (forks, engine, carb, frame, wiring loom + other bits that are not on here,are going up for sale) any questions please ask

all stuff for sale (Buyer sorts courier or Collection)

Engine + Carb + Wiring loom Will be soild as one unit Open to Decent offers around £650

Engine (Fully rebuilt check the above posts out)
Carb PWK32 Keihin (Brand new never used)
Wiring loom + 3RM-20 CDI + PV servo (Wiring loom Needs a little work, no ignition switch, no indicator wiring as the loom was made bare for green laning less stuff togo wrong when out and off roading)

WR426F + aliminium adapter + New head set bearings dust sheilds and shims (No wheel or caliper or Disc) (also see posts above) (£160 OVNO)

WR 200 Swingarm + Caliper and Carrier £115 OVNO (Can get photos by Request) Open to offers

Frame + tank + Rad as it is Needs sand blasting and powder coating in buyers color choice, the frame has had nuts welded onto the original nuts where the original ones stripped out and has had the rear brake master cylinder mount reinforced with 4mm steel welded on Comes with V5 also has a WR125 Rad with rubber vibration mounts fitted and Red fan will need wiring up to the bike fitted to the standard rad mount tank still fits on with the plastics extra pipe fittings on the rad may need blanking off (Price will be how ever much the powder coating costs + £200) can get photos by request

Other bits i have are two rims front and rear they need blasting and powder coating no hubs no spokes i have New bearings for the DTR hubs can get photos by request... Open to offers

cant name all the parts i have off hand but if you want to know if i have a part ask and i will see if i have the parts

@theportingmaster said in 2003 Yamaha Dt125R Project:

K38 slow jet

cheers buddy, il be getting a limited edition stainless steel and silencer exhaust from portugal in the next few months, will upload photos when its arrived!

@jonne123 there,s a few topics on this site already buddy try reading through them, this is for posting about my progress on my project

https://dt125r.co.uk/topic/790/recommended-reeds

@theportingmaster cheersa for your post mate ill have to stick with the PWK32 or now as it was a crimbo prezzie, what jet size did you use on the pwk on the 2003 dt? would be good to know. cheers buddy!

hello and welcome

heres some photos all shiney and new

well guys for chrismas i got a PKW 32 keihin carb off my old man Looks mint he said its good for a 125cc upto a tuned 200cc will upload photos later on.